Fastening device for casements and other hinged shutters.



P. LEIST-WETTL-ER' FASTENING DEVICE FOR GASBMENTS AND OTHER HINGED SHUTTERS.

APPLIOATIOH FILED MAY 26,1911.

1,013,501., Patented Jan. 2, 1912.

A/ V MOW/16y PAUL LEIST-WETTLER, OF SGHGNENWERD, SWITZERLAND.

FASTENING DEVICE FOR GASEMENTS AND OTHER I-IINGED SHUTTERS.

Specification of Letters Patent.

Application filed May 26, 1911.

Patented Jan. 2,1912.

Serial No. 629,751.

To all whom it may concern:

Be it known that I, PAUL LnIs'r-Wnmnn, a citizen of the Swiss Republic, residing at Schonenwerd, in Switzerland, have invented certain new and useful Improvements in Fastening Devices for Casements and other Hinged Shutters, of which the following is a specification.

The object of this invention is to provide an improved device for fastening hinged shutters, more particularly outwardly opening easements and casement shutters, in closed and open position.

To this end the invention provides a device of the class wherein a fixed plat-e or segment having recesses arranged in an arc of a circle is used in combination with a catch connected to the hinged member, so that the latter can be fastened in closed, open, or partly open position by engaging said catch with one or other of said recesses. In order to be suitable for an outwardly opening casement a fastening device of this kind must have means for operating it from inside when the casement is shut, and one part of the present invention consists in providing such means.

Another part of the invention consists in an arrangement whereby automatic engagement of the catch with the fixed plate produces a very rigid connection between the plate and hinged member, instead of the somewhat loose connection which has hitherto characterized automatic catches in this class of fastening device. Looseness of connection is highly undesirable in the case of an outwardly opening casement, in view of the rattling to which it gives rise even in a slight breeze.

The present invention provides a simple, strong and eflicient device, which meets both the requirements indicated.

The invention is illustrated in the accompanying drawing, in which Figure 1 is an elevation showing the device as viewed from the outside. Fig. 2 a horizontal section on the line AB of Fig. 1, and Fig. 3 a vertical section on the line CD of Fig. 2. Fig. 4 is an elevation of a cam plate forming part of the device.

In the drawing, a represents the fixed plate, with radial notches or recesses b; d is the fixed pin of the hinge e to which the window frame F is fixed, the knuckle of the hinge being slidable on the pin. The eye f of the catch-lever f loosely engages the pin (Z between the hinge knuckle and the plate a, the bore of said eye being of sufiicient size to enable the lever to rock vertically. The catch-lever has a slot f and carries two wedge-shaped dogs the lower dog f being adapted and arranged to engage the recesses 12.

The frame F and the hinge-strap are traversed by a pin it, the outer end of which is bent upward and rearward to engage the slotted part f of the lever f, so that the latter can be vertically rocked by rotating the pin 72. A wing-nut i with lateral projections 2' is screwed to the inner end of the pin it. Between said nut and the frame F the pin it traverses a plate is which is screwed to the frame, and a cam-plate Z having two cam-ridges Z The cam-plate has an eccentric hole Z for passage of the pin it, and a central slot k adjoining this hole. The pin it has a constricted, flat-sided part 71. adapted to fit into the slot Z WVhen the cam plate has been slipped on to the shank of the pin it the plate is moved perpendicularly to the shank so that the part 71, enters the slot Z and the pin cannot rotate in the plate, though still axially movable.

WVhen the parts have been thus mounted, and the nut i is tightened up, the projections 2' ride up the inclined surfaces of the ridges Z and the nut draws the pin it inward, and at the same time depresses the lever f, so that the lower dog J on said lever is firmly pressed into whichever recess Z) it is over, say the innermost recess, as shown in Fig. 1. The lever f is by the same operation firmly clamped against the frame F, so that a rigid connection is made between the latter and the plate a. On unscrewing the nut i the projections 2' abut against the perpendicular surfaces of the cam-ridges, and retate the plate Z, together with the pin h, and the latter rocks the lever f upward into the position indicated by dotted lines in Fig. 1, so that the dog is disengaged from the plate a, and the hinge and frame F are slightly lifted. If the frame F is then swung outward, the nut being left free to rotate, the weight of the frame acting on the catch lever f will cause the lower dog J to enter the next recess 3) and make connection with the plate a. The wedge-shape of the dog together with the weight of the frame, insures absence of rattling.

Only one dog is essential to the working United States is 1. The combination, with a shutter and a hinge supporting said shutter, of a fixed plate having recesses arranged in an arc of a circle centered at the axis of the hinge pin, a catch-lever provided with a dog, said lever being mounted on the hinge pin between the knuckle of the hinge and the plate, so that said knuckle presses said lever against said plate, and said lever having rocking movement in planes perpendicular to the plate, and means actuatable from the inside of the shutter for rocking said lever for engagement and disengagement of said dog.

2. The combination with a shutter and a hinge supporting said shutter of a fixed plate having recesses in an arc of a circle centered at the axis of the hinge pin, a catch-lever provided with a dog, said lever being rotatable about said axis and also having rocking movement enabling said dog to be moved into and out of engagement with said recesses, a rotatable pin traversing said shutter and having an arm which engages said catch-lever for the purpose of rocking same, said pin being screw-threaded at a part on the inside of the shutter, a nut on the screwthreaded part of said pin, and a cam plate slidable but not rotatable on said pin between said nut and the shutter, said nut and cam plate coacting so that on rotation of the nut in one direction the pin is rotated to move the catch-lever into engagement, and is at the same time drawn inward to clamp said lever by means of said arm, whereas on rotation of the nut in the other direction the pin rocks the lever out of engagement with the fixed plate.

In combination with a shutti-r, a hinge comprising a fixed plate, said fixed plate having recesses in the edge thereof, a pin fixed to said plate, a catch-lever, lugs provided on said catch-lever, saidlugs adapted to engage in the recesses provided in the said fixed plate, said lever having an eye in one end thereof, the walls of said eye being angular-1y disposed, said eye adapted to loosely embrace the pin, an elongated eye in the opposite end of said catchlever, an ope 'ating pin, said pin having a screwthreaded portion and a right-angled portion, the right-angled portion adapted to engage in the elongated eye provided in the catchlever, and means fixed to the shutter for operating said hinge.

In witness whereof I have signed this specification in the presence of two witnesses.

PAUL LEIST-WETTLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington. D. C. 

